html5静态网页通过AJAX来实现微信分享功能

现在通过微信来分享阅读，分享丰富多彩的内容，已常态化。那么我们怎样实现HTML5移动端通过微信来分享，让分享更加的生动、图像化呢？不要只是一个分享链接和链接的图标。HTML5静态页面或ASP程序端的，我们可以通过AJAX+PHP来实现功能。

1、前端页面引入JS：

2、前端页面添加分享AJAX:

3、后端JSSDK:

$url = $_GET['url'];

class JSSDK {

    private $appId;

    private $appSecret;

    private $url;

    public function __construct($appId, $appSecret,$url) {

        $this->appId = $appId;

        $this->appSecret = $appSecret;

$this->url = $url;

    }

    public function getSignPackage() {

        $jsapiTicket = $this->getJsApiTicket();

        $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";

      // $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]"; 

$url =$this->url;

        $timestamp = time();

        $nonceStr = $this->createNonceStr();

        // 这里参数的顺序要按照 key 值 ASCII 码升序排序 

        $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url"; //这里经常出问题,一般都是这里出现问题，要留意 

        $signature = sha1($string);

        $signPackage = array(

            "appId" => $this->appId,

            "nonceStr" => $nonceStr,

            "timestamp" => $timestamp,

            "url" => $url,

            "signature" => $signature,

            "rawString" => $string

        );

        return $signPackage;

    }

    private function createNonceStr($length = 16) {

        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

        $str = "";

        for ($i = 0; $i < $length; $i++) {

            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

        }

        return $str;

    }

    private function getJsApiTicket() {

        // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例 

        $data = json_decode(file_get_contents("jsapi_ticket.json"));

        if ($data->expire_time < time()) {

            $accessToken = $this->getAccessToken();

            // 如果是企业号用以下 URL 获取 ticket 

            // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken"; 

            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";

            $res = json_decode($this->httpGet($url));

            $ticket = $res->ticket;

            if ($ticket) {

                $data->expire_time = time() + 7000;

                $data->jsapi_ticket = $ticket;

                $fp = fopen("jsapi_ticket.json", "w");

                fwrite($fp, json_encode($data));

                fclose($fp);

            }

        } else {

            $ticket = $data->jsapi_ticket;

        }

        return $ticket;

    }

    private function getAccessToken() {

        // access_token 应该全局存储与更新，以下代码以写入到文件中做示例 

        $data = json_decode(file_get_contents("access_token.json"));

        if ($data->expire_time < time()) {

            // 如果是企业号用以下URL获取access_token 

            // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret"; 

            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";

            $res = json_decode($this->httpGet($url));

            $access_token = $res->access_token;

            if ($access_token) {

                $data->expire_time = time() + 7000;

                $data->access_token = $access_token;

                $fp = fopen("access_token.json", "w");

                fwrite($fp, json_encode($data));

                fclose($fp);

            }

        } else {

            $access_token = $data->access_token;

        }

        return $access_token;

    }

    private function httpGet($url) {

        $curl = curl_init();

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

        curl_setopt($curl, CURLOPT_TIMEOUT, 500);

        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);

        curl_setopt($curl, CURLOPT_URL, $url);

        $res = curl_exec($curl);

        curl_close($curl);

        return $res;

    }

}

$jssdk = new JSSDK("填写你的APPID", "你的APPSECRET",$url);//按照自己的公众号填写 

$signPackage = $jssdk->GetSignPackage();

// var_dump($signPackage); 

$tmp=json_encode(array ('appId'=>$signPackage["appId"],'timestamp'=>$signPackage["timestamp"],'nonceStr'=>$signPackage["nonceStr"],'signature'=>$signPackage["signature"],'url'=>$signPackage["url"]));

$callback = $_GET['callback'];

echo $callback.'('.$tmp.')';

exit;

?>